How do I buy with OKX?

Hello there, I'm curious about purchasing cryptocurrency through OKX. Could you please guide me through the process step-by-step? I'm particularly interested in knowing how to sign up, fund my account, and place an order for a specific cryptocurrency. Additionally, I'd like to understand the security measures OKX has in place to protect my funds and personal information. Is there a minimum deposit requirement, and what are the fees associated with trading on OKX? Thank you for your assistance.